Basalt Idaho Climate Data

Monthly Average Climate Data for Basalt Idaho

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.2 °C-0.9 °C22.35 mm
February-8.5 °C1.8 °C15.75 mm
March-3.4 °C8.7 °C24.13 mm
April-0.6 °C14.2 °C27.18 mm
May3.7 °C19.3 °C39.62 mm
June7.3 °C24.2 °C28.45 mm
July10.4 °C30 °C12.45 mm
August9.5 °C29.8 °C15.24 mm
September5.3 °C24.1 °C23.88 mm
October-0.1 °C15.8 °C26.42 mm
November-5.2 °C6.8 °C18.03 mm
December-9.7 °C-0.3 °C20.32 mm
Annual-0.1 °C14.5 °C273.82 mm

Climate Data for Basalt Idaho

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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